Going to school from 8 a．m．until 5 p. m．may sound terrible，but Sydney Shaw，a seventh grader at the Alain Locke Charter Academy on Chicago's West Side，has come to like it—as well as the extra 20 or so days that she's in class every year．“I'm sure every kid at this school says bad things about the schedule sometimes，”says Sydney，who was at school on Columbus Day．when most Chicago schools had a holiday．“But we all know it's for our benefit．”

Finding ways to give kids more classroom time，through longer hours，a longer school year，or both，is getting more attention．“If you want to look at schools where the achievement gap is narrowing．they're saying they couldn't do it without the added time，”says Jennifer Davis．“Even when you get good teachers into schools，you also need more time．”

According to studies．low-income students fall back more than two months in their reading skills over summer vacations．“It's over the summer months that poor kids fall behind，”says Karl Alexander，a sociologist．“If you have parents who themselves didn't succeed at school and aren't highly educated，kids aren't going to get those skills at home．”

Schools are asked to take a full year to plan how to best use the extra time—a process involving teachers，principals，students and parents．They are given outside support to help them base their plans on the best available analyses of student needs．It's still early，but officials are already seeing stronger test scores and a narrowing achievement gap．

But some critics are worried．“We risk producing something that's very expensive and time-consuming．and that will give educators a lot of trouble，”says Frederick Hess．“Before we spend all that extra money，I'd much rather see if we can figure out how to get 50 percent more instructional time out of the current school day．”

66．From the first paragraph，we learn that       ．

A．the longer schedule is harmful to kid's health

B．all Chicago students had a holiday on Columbus Day

C．Sydney Shaw supports the added time

D．few kids are bored with the lack of holidays

67．Low-income students fall behind in summer because       ．

A．no good teachers are willing to teach them

B．they can't get help from their parents

C．their parents are unwilling to hire private teachers

D．they themselves have no desire to learn

68．They are in favor of adding school hours except       ．

A．Sydney Shaw              B．Jennifer Davis

C．Frederick Hess              D．Karl Alexander

69．Some people are worried about adding school hours mainly because       ．

A．it will have a bad effect on the kids’futures

B．the current school day has been too busy

C．no one supports the idea

D．it will be costly and time-consuming

70．The text is mainly about       ．

A．whether a longer school day will help narrow the achievement gap

B．how students have benefited from additional school hours

C．why the achievement gap among students needs to be narrowed

D．what causes the achievement gap among students

Most schools ban chewing gum，but in a few years they might consider changing that rule．Why？ Scientists are finding evidence that gum chewing may be good for your health．It may even help boost（提高）your test scores．

This exciting research is just beginning．And in the meantime，companies are also experimenting with adding vitamins，minerals，medicines，and other substances that could give gum the power to cure headaches and fight everything from serious diseases to bad breath．

People have been chewing gum for thousands of years．Ancient Greeks，Mayas，and Native Americans，for example，chewed on the sap，or resin of certain types of trees．Today gum is a litde more complicated．Gum manufacturers start by mixing resin，wax，and a molecule called polyvinyl acetate to make a gum base．By varying the types and amounts of these ingredients，scientists can make thousands of formulations．

Just what can gum do for your health？Many studies show that chewing gum after meals fights cavities（洞）by stimulating the production of saliva．Saliva helps wash away bacteria that damage our teeth．An ingredient called xylitol，which is added to it，provides an extra dose of cavity－fighting power．This is good for more than just the teeth．Research suggests that good oral health decreases the risk of heart disease，and other serious diseases．

Chewing gum might also be good for your brain．Chewing gum boosts the flow of blood to participants’brains by 40 percent．

But too much chewing can damage the jaw joint．And chewing too much of gum that contains vitamins，caffeine，or a medicine could lead to an overdose．What’s a more，no matter how healthy gum chewing proves to be，it will never be a match for a healthy lifestyle．

Nothing like gum or a vitamin is going to cure a bad dietary habit or a bad exercise habit；it’s not a magic bullet．

64．Why are companies trying to put medicines into gum？

A．Because they want gum to cure some diseases．

B．Because they wish people to become addictive to it．

C．Because they plan to make gum more tasteful．

D．Because they hope to make gum good for teeth．

65．From the last two paragraphs，we can infer that      ．

A．chewing gum has a magic power to cure your bad lifestyle

B．chewing gum can’t  replace the healthy lifestyle

C．chewing gum can lead to a bad exercise habit

D．too much gum chewing proves to be harmful to your teeth

66．How does chewing gum fight cavities？

A．By making people brush teeth immediately after meals．

B．By killing bacteria that are harmful to our teeth．

C．By making people produce more saliva．

D．By adding some more medicines to the gum．

67．The best title for the passage may be      ．

A．A Match for Exercise                                  B．Gum Chewing is a Magic Bullet

C．No Gum Chewing at School                        D．Chewing Gum for Health

Here are some patients(病人), each of whom wants to see a doctor . Decide which doctor is suitable for the patient mentioned. There is an extra doctor that is not suitable for any of the patients.
1. _____ Patient one. He has a running nose all day. He has a fever and constant cough.
2. _____ Patient two . She sleeps poorly . She has difficulty in sleeping , and is unable to concentrate. She also has nightmares（恶梦）occasionally.
3. _____ Patient three. His tongue is red and sore (痛) all over . His breath smells bad and he has
a bad taste in his mouth .
4. _____ Patient four. His blood pressure is really high. His head aches when he bends over or lies down.

A．Brown , a medical student majoring in oral cavity (口腔), is having his practice in a teaching hospital . Every day he meets quite a few people with a toothache , throat trouble and so on.

B．Tom is a psychologist (心理学家) . He keeps in touch with his mental patients by phone.

C．Wood , an adviser and doctor in a hospital , thinks we should pay more attention to what we eat . It is a problem that many people are becoming fatter and fatter. In his opinion, blood pressure is connected with it and he is trying his best to solve this kind of problem.

D．Mary , a female doctor , is doing research in breast-cancer . A lot of woman , she thinks , are suffering from this kind of disease all over the world . She has made up her mind to help these women.